Attachment for shuttles.



G. PAVIA. ATTACHMENT FOB SHUTTLES. APPLICATION FILED PER. 14, 1910.

Patented Oct. 17, 1911.

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G. PAVIA. ATTACHMENT FOR SHUTTLES. APPLICATION 111.111) r1111. 14, 1910.

1,006,400. Patented 0111;.17,1911.

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GIUSEPPE PAVIA, OF ALLENTOWN, PENNSYLVANIA.

ATTACHMENT FOR- SHUTTLES.

Specification of Ietters Patent.

Application filed February 14, 1910. Serial No. 543,730.

To all whom it may concern:

Be it known that I, GrUsErrn PAVIA, a subject of the King of Italy, residing at Allentown, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements in Attachments for Shuttles, of which the following is a specification.

My invention relates to improvements in attachments for shuttles, the object of the invention being to provide an improved attachment of this character which will, when an unusual pull is had on the thread, sever the thread so as to prevent damage.

A further object is to provide an improved attachment which may be secured to shuttles in ordinary use, and which may be set so as to allow the thread to feed from the bobbin just so long as the loom is working properly, but when, from any cause an unusual pull is had on the thread or a knot or tangle in the thread reaches the attachment, the thread will be automatically severed so that the shuttle will run free.

With these and other objects in view, the invention consists in certain novel features of construction, and combinations and ar rangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure 1, is a plan view of a shuttle illustrating my improved attachment in position therein. Fig. 2, is a view partly in side elevation, and partly in longitudinal section of Fig. 1. Fig. 3, is an enlarged perspective view of the attachment removed. Fig. 4, is a view in longitudinal section through the attachment on the line 4, 4, of Fig. 6. Fig. 5, is a view in section on the line 5, 5, of Fig. 6. Fig. 6, is an end view with the parts in set position. Fig. 7, is a view similar to Fig. 6, but showing the parts in position after the thread has been severed. Fig. 8, is an enlarged view in cross section on the line 8, 8, of Fig. 1. Fig. 9, is a detailed perspective view of the knife or cutter 9, and Figs. 10, and 11, are detailed perspective views of the levers 22, and 29, respectively.

1 represents a shuttle of ordinary construction, and 2, is a bobbin therein, from which the thread'3, is drawn.

My improved attachment, which is illustrated in perspective in Fig. 3, comprises a 1 block 4, which is adapted to be secured with- 'in the shuttle near its forward end by means Iof screws 5.

6, represents a metal plate which is secured to the bottom of block 4, by means of screws 7, and is provided with an upturned end 8, spaced slightly from the end of block 4, so as to accommodate a knife or cutter 9, which is pivotally secured to the end 8, by means of a rivet 10. This knife or cutter 9, is provided with a finger 11, projecting rearwardly, in an opposite direction to a perforated integral ear 12, which serves as the fulcrum or pivot of the cutter. The upper portion of the knife is enlarged, and is provided with a forward sharp cutting edge 13, with a shoulder 14, above the same, and with a rear cam face or edge 15, above finger 11.

Block 4, is provided with a longitudinal bore 16, for the passage of the thread 3. This bore is preferably at an incline, as shown and is provided with eyes 17, at its ends, and the forward end of this bore 16, registers with an opening 18, in end 8, so that the thread after passing through the bore 16, will bridge the space between the end 8, and the end of block 4, and lie in the path of movement of the knife or cutter 9. After passing through the opening 18, the thread extends through the tension device 19, and thence through an eye 20, in the side of the shuttle.

Block 4, is provided in its upper face at or about its center, with a longitudinal groove 21, which extends throughout the length of the block, and a lever 22, projects through this groove, and is pivotally supported between its ends on a pin 23, 3roject-' ing through the block. The forward end of this lever 22, extends across the space between block 4, and end 8, and normally lies in the path of shoulder 14, on the knife or cutter 9, to hold the knife or cutter back away from the thread. The extreme forward end of lever 22, projects through a slot 24, in end 8, and the rear end of this lever is provided with an eye 25, through which the thread passes between the bobbin 2, and the block 4. A coiled spring 26, is located in a pocket or recess 27, in block 4, and bears upward against the rear end of lever 22, to normally hold the forward end of the lever in position, to hold back knife 9.

Patented Oct. 1'7, 1911.

The block 4:, is provided in its lower portion, at one side of its center, with a longiits ends in said groove 28, by means of a pin 30. A coiled spring 31, is located in a pocket or recess 32, in block 4:, and bears downward against the rear end of lever 29. a

The forward end of this lever 29, extends across the space between block 4, and end8, and lies in the space between the finger 11,

and the cam edge 15, of knife or cutter 9, normally bearing upward against the cam edge 15. The forward end of the lever 29, projects througha slot 33, in end 8, far enough to be engaged to manipulate the le-' ver, and set the knife or cutter.

In normal operation the parts are as shown in Figs. 3, 4:, 5, 6, with the thread 3, from bobbin 2, passed through the eye 25, of lever 22, thence downward and through the bore 16, through the opening 18, thence through the tension device 19, and out through the eye 20. Should a knot or tangle in the thread reach the eye 25, which is too large to pass through the eye, or for any other reason an unusual pull is had on the thread, the rear end of lever 22, will be drawn downward, and the forward end of this lever 22, elevated sufficiently to move the lever out of the path of knife or cutter 9. The pressure of spring 31, on lever 29, will cause the forward end of the lever to fly up and owing to its engagement with the edge 15, of the knife or cutter, will swing the latter on its pivot and the cutting edge 13, will pass across the opening 18, and sever the thread. To reset the device, it is simply necessary to force downward the forward end of lever 29. This movement of lever 29, by reason of engagement of the lever with the finger 11', will draw the knife or cutter 9, back to set position. During this movement of the knife, the forward end of the lever 22, rides on the curved upper edge of the knife or cutter until the knife or cutter moves far enough for lever to spring down in front of shoulder 14:, when the parts are set for further use.

When a shuttle is provided with my improved attachment, the many accidents and damage that are caused by reason of entanglements in the loom, are entirely overcome, for as soon as there is any unusual pull on the thread, or as soon as a knot or tangle reaches the attachment, the thread will be automatically severed and the shuttle run free.

Various slight changes might be made in the general form and arrangement of parts described without departing from my invention and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

l. The combination with a shuttle, of a thread severing device, means for moving the said device to sever the thread, and means normally holding said device against movement, said last mentioned means operated by an unusual pull on the thread which serves to release the thread severing device.

2. An attachment for shuttles, comprising a block adapted to be secured in a shuttle, and having an opening therethrough for the passage of the thread, a cutter, a spring pressed lever engaging said cutter, and tending to move the cutter across the thread, a second spring pressed lever normally holding said cutter away from the path of the thread, and an eye on said last mentioned lever through which said thread passes.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GIUSEPPE PAVIA.

Witnesses CARMINE LAOOO, LOUIS CoNsoLE.

Copies .of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

